The Kennedy Center's site for the production is here. Performances occur Nov. 14, 16, 18, 20, 21, and 22 in 2015.
There is a lot of quality free video material (all of it "legal") about the opera on the Washington National Opera's own YouTube channel here.
It would sound logical that a Universal Studios or a Columbia Pictures would want to make an Oscar-season film based on the opera in a couple years, the sort of film that can open on a Christmas Day.
First three pictures: Appomattox, VA, my visit in 2005; also visited Farmville that day. Also, Pettus bridge in Selma AL, my visit, May 2014.